SN4 ""

No	Pattern	Freq
1	[noun prp] [vb mod] have been [art] [adj]	69
2	[noun prp] [modal v] have been [art] [adj]	52
3	[noun prp] [modal v] have been a [adj]	47
4	[noun prp] would have been [art] [adj]	26
5	[noun prp] would have been [art] [adj]	26
6	[noun prp] [modal v] have been the [adj]	17
7	[noun prp] must have been [art] [adj]	14
8	[noun prp] must have been [art] [adj]	14
9	[noun prp] may have been [art] [adj]	12
10	[noun prp] may have been [art] [adj]	12
11	[noun prp] might have been [art] [adj]	7
12	[noun prp] [modal v] have been [art] first	7
13	[noun prp] [modal v] have been [art] [adj -er]	7
14	[noun prp] might have been [art] [adj]	7
15	[noun prp] [modal v] have been [art] [num ord]	7
16	[noun prp] [modal v] have been [art] first	7
17	[noun prp] [modal v] have been [art] good	7
18	[noun prp] should have been [art] [adj]	5
19	[noun prp] could have been [art] [adj]	5
20	[noun prp] should have been [art] [adj]	5
21	[noun prp] [modal v] have been an [adj]	5
22	[noun prp] [modal v] have been [art] better	5
23	[noun prp] could have been [art] [adj]	5